package servlet;

import pojo.Dept;
import service.DeptService;
import service.impl.DeptServiceImpl;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;

//注解
@WebServlet(urlPatterns = "/dept")
public class DeptServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doPost(req, resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        // 创建业务层对象
        DeptService deptService = new DeptServiceImpl();
        // 1请求编码设置
        req.setCharacterEncoding("UTF-8");

        String action = req.getParameter("action");
        //判断action来区分是哪种操作
        if ("list".equals(action)){//执行查询操作
            // 获取参数
            String dname = req.getParameter("dname");

            Dept condition = new Dept(dname);
            List<Dept> depts = deptService.findAll(condition);

            req.setAttribute("depts",depts);
            req.setAttribute("condition", condition);
            // 在哪个页面显示数据
            req.getRequestDispatcher("/list.jsp").forward(req, resp);

        }else if ("delete".equals(action)){
            // 获取参数
            String sid = req.getParameter("id");
            int id = Integer.parseInt(sid);

            int result = deptService.deleteDeptBuId(id);
            if(result>0) {
                //重定向
                resp.sendRedirect("dept?action=list");
            }
            else{
            }
        } else if ("add".equals(action)) {
            // 获取参数
            String dname = req.getParameter("dname");

            int result = deptService.addDept(new Dept(dname));
            if(result>0) {
                //重定向
                resp.sendRedirect("dept?action=list");
            }
            else{
            }

        }
        else if ("update".equals(action)) {
            // 获取参数
            String sid = req.getParameter("id");
            int id = Integer.parseInt(sid);
            String dname = req.getParameter("dname");

            int result = deptService.updateDept(new Dept(id,dname));
            if(result>0) {
                //重定向
                resp.sendRedirect("dept?action=list");
            }
            else{
            }

        }
        else if ("toupdate".equals(action)) {
            // 获取参数
            String sid = req.getParameter("id");
            int id = Integer.parseInt(sid);
            //TODO 创建业务层对象
            Dept dept = deptService.findDeptById(id);
            //将数据显示出来

            //把数据放到请求域中
            req.setAttribute("dept",dept);
            //在哪个页面显示数据
            req.getRequestDispatcher("/updateDept.jsp").forward(req,resp);

        }

    }
}
